Improvement in light-intensifying attachments for gas-burners



` SR1-BACON l A Light-.tensify'ing Attachment for Gas-Burners..

N0. l27,82.9. l Patented-June11,1872.

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Uivrrnn 'STA'rEs PATENT OFFICE.

STEUBEN T. BACON, OF BOSTON, MASSACHUSETTS.

lMPROVEMENT iN LIGHT-INTENSIFYING ATTACHMENTS FOR GAS-BURNERS| Speciticnt ion forming part of Letters Patent No. 127,829, dated June 1l, 1872.

To whom yit may concern:

Be it known that I, STEUBEN T. BACON, of Boston, Suffolk county, Massachusetts, have invented certain new and useful Improvements in Li ght-Intensifying Attachments for Gas and other Burners, of which the following is a specitcation:

This invention has'for its object the coucentration of the light from the iiame of a gas or other burner, whereby an increased and concentrated light may be thrown upon any surface where such light is required, either for artists work or for other purposes. To effect this result I make use of a planoconvex lens of glass, which is hinged to a bracket, which, in turn, is hinged to an arm projecting from and adjustable upon the gas or other iiXture for producing an illuminating iiame, there being at each of the hinged joints a set-screw, by which the lens or its bracket, when adjusted to any desired position, may be iirmly fixed and held in that position.

I have represented the manner in which my invention is or may be carried into effeet in the accompanying drawing which represents a perspective view of the device attached to the standard of a gas-burner.

A is a plano-convex lens of glass, pivoted or hinged in a metallic bracket, B, being hung on the shanks of set-screw a, whose inner ends screw into sockets formed for them in the lens or vin a suitable frame encircling the same. The lens swings on these setscrews, and, after being placed at any desired inclination, may be there held by tightening up the screws. The bracket B has a shank, C, whose lower end fits between the forked endl of a metallic arm, D. Aset-screw, b, passes loosely through one prong of the fork and the intermediate shank, and screws into and through the opposite prong of the fork, so that, after setting the bracket at any angle, it may be held in its position by tightening np the set-screw. The arm D at its other end iits around the standard E of the gas xture, and is capable of sliding up and down thereon 5 and it carries a set-screw,c, by which it may be held firmly at any desired elevation on the standard. The arm also turns on the standard, so that the attachment ma-y be adjusted to any point around the burner. The arm may be of less length than represented, if desired.

I am aware that it has been proposedto use with a gas-burner a light-concentrating attachment, thelens of which is formed of water contained in a hemispherical cup. But this device is inconvenient onseveral accounts. The surface of the water becomes soon covered with ilnpurities, and the water clouded with dust and other foreign matter, so that the cup must be frequently emptied and refilled, and it is not practicable to use this device with any other than a horizontal burner, and in other than a horizontal position, otherwise the water would be spilled. And, again, the device is sensitive to very slight vibrations, which produce correspon din g movements of the surface of the water, and thus interfere with the steadiness of the concentrated light. In the improved device which I have above described these objections are obviated. The lens can be used with a horizontal or vertical or inclined burner. It can be set at any angle to concentrate the light upon a surface either directly below or to one side of the burner.

Having described my invention and the manner in which the same is or may be carried into effect, I would say that I do not limit my claim to the precise number of joints herein described, nor to the precise means of effecting the adjustment of the different parts, for it is manifest that these may be varied without departure from the invention, all that is necessary in this regard being that the attachment should be capable of adjustment so as to concentrate the light upon any side of the burner, and either directly below it or obliquely from or to one side of it, whether the burner be vertical, horizontal, or inclined.

I would further observe that I do not claim as my invention the glass lens of plano-convex form, as that has been known before my said invention; but- What I claim, and desire to secure by Letters Patent, is-

A light-intensifying or concentrating at taehment for gas and other burners, consistin g of a glass leus, iu combination with a frame In testimonyr whereof I have siguedmynalue or support, constructed substantially as hereto this specification before tWo subsorlbng Wltin described, so that it may be attached to and nesses.

adjustable upon the gas or other fixture, and STEUBEN T. ACON. so that the leus may be adjusted and set iu Witnesses: any desired position With respect to the ame, J. RUSSELL BRADFORD,

as and for the purposes vset forth. GEORGE H. FOLGER. 

